Midway through day three of the Guardian's tax series and there has already been an enormous reaction. Keep your comments coming.

The series has already prompted parliamentary action in the shape of an early day motion tabled by Labour Co-op MP David Taylor. He proposes that parliament "applauds the Guardian's serialised coverage of the tax avoidance industry and its cost to the public" and "calls on the government to respond formally to the Guardian's findings as part of a wholesale review of the corporate tax system". Supporters of the Guardian's work can call on their MP to sign up to early day motion 665.

Views unsurprisingly range across the political spectrum. Leave companies alone as long as they operate within the law, say some. Bobtheblogger summed up the views of many when he said that companies "aren't obliged to arrange themselves so that Gordon can bury his shovel into their profits and reserves".

Others welcome the Guardian's exposés as finally holding transnational corporations to account and asking them to pay their dues to the society from which they benefit. Greatgrandad posted that "unless ...those who take part in that shameful undermining activity (even though it is "perfectly" legal) are scorned, my greatgrandchildren will have had a less than appropiate upbringing".

Congrtatulations for the Guardian's work so far have arrived from trade unions including Her Majesty's Revenue and Customs' senior officials' union ARC (of which I was once, I ought to declare, an executive committee member). The ARC president, Terry Cook, welcomes the spotlight falling on the "extraordinary challenges facing my members in the vital work they do" and calls for "investment not cutbacks" in the tax department.

And yesterday's revelation on this blog that HMRC is retreating from tackling cross-border "transfer pricing" tax avoidance should, says a post from sarbanesoxley, "be a source of serious public concern and debate".

Early day motion 665 in full: That this House applauds the Guardian's serialised coverage of the tax avoidance industry and its cost to the public; observes that due to the complex and secretive nature of tax avoidance there is no accurate figure for the amount of tax that big business avoids paying in the UK every year; notes that the Trades Union Congress (TUC) estimates this annual hole in the public accounts to be £12 billion whilst the Public Accounts Committee puts the figure at £8.5 billion; further notes with concern the National Audit Office's finding that in 2006 more than 60 per cent. of Britain's 700 biggest companies paid less than £10 million corporation tax and 30 per cent. paid nothing; regards companies in the FTSE 100 and others indulging in this highly addictive practice as guilty of corporate malfeasance; seriously regrets that families and small to medium-sized businesses continue to plug this gap through disproportionately higher taxes; regrets the Government and HM Revenue and Customs' decision to close local tax offices at a time when the tax system is under sustained attack from the major accountancy firms on behalf of their corporate clients during a recession; believes that those accountancy firms offering tax avoidance products and advice should be excluded from tendering for public sector contracts until they stop serving this highly destructive and socially irresponsible corporate habit; and calls on the Government to respond formally to the Guardian's findings as part of a wholesale review of the corporate tax system.